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Патент USA US2136935

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Nov. 15; 1938.
Filed Dec. FLO, 1936
4 Sheets-Sheet} l
Nov. 15, 1938.
Filed Dec. 10, 1936
4 Sheets-Sheéfr, 2
Nov. 15,1938.
Filed Dec. 10, 1956
4 Sheets-Sheet 3
Nov. 15,, 1938.
2,136,935 1
Filed Dec. 10, 1956
Patented Nov. 15, 1938
Ernest Clark, Brockton, Mass.
. Application December 10, 1936, Serial No. 115,143
7 Claims.
This invention relates to wool cards, or, in
other words, cards of the type in which rotary
workers cooperate with the cylinder in performing
the carding operation, as distinguished from the
5, so-called revolving ?at cards used in carding
The fundamental purposes of carding wool are
to separate the ?bers, to free the ?ber from for
eign materials, and to arrange the fibers in a
; more or less parallel relationship to each other.
(Cl. 19-108)
In the drawings,
Figure 1 is a rear elevation of a power unit or
motor provided by this invention for the pur
pose of revolving the worker shaft during the
stripping operation;
Fig. 2 is a side View, chiefly diagrammatic in
character, illustrating a portion of a wool card
and showing the power unit applied to one of
the . workers ;
Fig. 3 is a front elevation of the unit shown in 10,
As this operation progresses, the spaces between
the needles or wire-s of the card clothing become
Fig. 1;
?lled with lint, dust, and other foreign materials
which must be removed from time to time since
line 4—4, Fig. 3;
= otherwise they would make proper carding im
possible. 'This cleaning operation is known as
“stripping.” Although the length of the intervals
Fig. 4 is a sectional view approximately on the
Fig. 5 is a sectional View on the line 5—5,
Fig. 4;
Fig. 1; and
at which stripping is necessary will vary with the
character of the work, it usuallymust be per
20 formed at the end of every eight or ten hour
run and in many cases at shorter periods.
While in recent years the stripping operation
Fig. 6.
Referring ?rst to Fig. 2, the main cylinder of
on the larger cylinders, such as the main and
a typical wool card is shown at 2, the licker-in at
do?er cylinders, has been greatly facilitated by
the application of vacuum stripping apparatus,
3, the worker rolls at 4, the stripper rolls at 5,
and a fancy at 6. Since the present invention is
particularly concerned with the stripping of the
auxiliary rolls which cooperate‘ with the main.
cylinder, such as the workers, strippers, fancy,
' which is permanently installed on the machines,
it is impractical to use such installations. for strip
ping the smaller rolls such as the worker and
stripper rolls. Accordingly, it is necessary to per
30‘ form this operation manually, Ordinarily the
" workmen push the rolls around by hand while
they comb out the waste material with a hand
card. If the machine is equipped for vacuum
stripping, then a crank is! attached to the workerv
or stripper roll and revolved by one workman
while another runs a suction nozzle over the
Fig. 7 is a view, partly in vertical section and
partly in side elevation, of another form of cou
pling which can be used in place of that shown in
and others, they will all, for convenience, be here
inafter included in the term “workers.”
The present invention provides a power unit
designed to be applied directly to any worker to
revolve that element for the stripping operation.
This unit takes the place of the man. with the
crank required by prior methods, as explained ~
above. Because such a power unit must be shift
ed at very frequent intervals from one worker to
roll where it will remove the foreign material.
Both methods are slow and involve extremely
arduous labor. Furthermore, it is impossible for
another, it is important that it be light in weight
and be self-supported. In addition, the unit must
a man to revolve a Worker by hand at'th-e speed
be reversible since in some machines it will be
best adapted for vacuum stripping. By either
method, therefore, the work is performed ine?i~
ciently and the machine is kept out of produc
whereas in other machines it must be usedv on
tion for a substantial percentage of each work
ing day.
The present invention deals especially with the
conditions above described. It aims to devise
an apparatus with the aid of which the time and
labor involved in stripping can be substantially
50 reduced.
The nature of the invention will be readily
understood from the following description when
read in connection with the accompanying draw
ings, and the novel features will be particularly
. pointed out in the appended claims.
Fig. 6 is a sectional view on the line 6—-6,
applied to the right-hand ends of the workers,
the left-hand ends of said members. A further
requirement is that such a unit revolve the shaft
at a higher speed than is possible with manual
Referring now to Figs. 1_. and 3 to 6. inclusive,
a power unit is there shown which satis?es these
requirements. It comprises a pneumatic motor
is always
to be operated
available at
by avacuum,
card, and
tions enabling the workman to connect this unit
instantly with, and to disconnect it from. any
one of the workers.
The unit includes a frame
8, Figs. 1 and 6, which supports the motor and cer
tain of the connections just referred to. The
motor is of the multicylinder type so that it will
have no dead center, and it includes three cylin
ders 9 secured rigidly to the frame piece 8 and
spaced 120° apart around the axis of the crank
‘shaft III. For convenience in mounting the cyl
inders, the frame piece 8, which consists of a
casting, may either have the cylinder heads |2
cast integral therewith or they may be cast sep
10 arately and secured rigidly to the frame member.
Each cylinder has a piston working in it, one of
these pistons being shown in Fig. 1 at I3, and
piston rods |4 connect the respective pistons with
the crank pin l5, this pin being mounted in a
15 crank arm l6 secured to the crank shaft l0.
Preferably the bearings for both the crank shaft
and the crank pin are of the ball, roller, or other
anti-friction type.
The vacuum connections to the various cylin
20 ders include a nipple l1, Figs. 1 and 3, to which
the end of the vacuum hose may be secured, the
bore of this nipple communicating with a chan
nel I8 which opens into a valve chamber 2| in
the valve block 22 of a reversing valve 23, best
25 shown in Figs. 3, 4 and 5 . From this valve cham
her two short hose and pipe connections 24 and
25, respectively, Figs. 3 and 4, lead into front
and rear channels 26 and 21, Fig. 6, of a dis
tributing ring 28 which is bolted to the front
30 face of the frame piece 8 and is co-axial with
the shaft I0. The front side of the groove 26 is
closed by a face plate 30, while the rear side of
the groove 21 is closed by the frame piece. This
ring distributes the air to the valve mechanisms
35 for the respective cylinders, as will readily be
understood by the illustration of the valves for
the uppermost cylinder 9 shown in Fig. 6. The
head I2 for this cylinder has air passages or ports
drilled in it and communicating through pipe
connections 3| and 32, Figs. 3 and 6, with the
valve ports 33 and 34, respectively, which open
into the respective distributing grooves 21 and
26. Two plunger valves 35 and 36 cooperate with
these respective ports to open and close them at
45 the proper times, these valves being operated by
cam segments 3‘! and 38 on the cam roll 39 which
is secured rigidly to the crank shaft I0. Each
valve plunger is encircled by a coiled spring which
tends to hold the lower ball end of the valve in
50 contact with its respective cam segment.
Each of the other cylinders is equipped with a
similar valve mechanism and with correspond
ing connections to the grooves in the distributor
ring 28, all of these valves being controlled and
operated by the ‘cam segments 3'! and 38. Con
sequently, in each revolution of the crank shaft
the valves will be operated at the desired times to
partitions or disks 0 and d, and circular side
ports e and J‘ are cut through the walls of the
valve outside of these partitions to accommodate
at the desired times with the respective ports a
and b. At the back of the valve 23 three sockets
g are provided, each adapted to receive a spring
pressed ball 4|, Fig. 5, this ball serving to hold
the valve yieldingly in any one of its three posi
tions of adjustment.
In its left-hand position,
as shown in Fig. 4, it admits suction or negative 10
pressure to the front distributing channel 26,
and opens the inner channel 21 in the distribut~
ing ring to the atmosphere through the connec
tion 25, ports I) and f, and the right-hand end
portion, Fig. 4, of the valve. This will result, 15
when suction is supplied through the hose con
nection to the nozzle I1, in revolving the motor
in one direction.
If now the valve plunger 23 is
moved to its central position, the motor will be
stopped because neither port a nor 1) then will be
in communication with pressure port 2|, Fig. 5.
If, however, the valve 23 is moved to its extreme
right-hand position, then the direction of rota
tion of the motor will be reversed. It should be
noted that this reversing valve is mounted at the 25
upper end of the handle 20 where it is within
convenient reach of the thumb and ?ngers of
the operator so that he can slide the valve in
either direction without releasing his hold on
the handle.
In order to enable the operator to instantly
connect the power unit to any worker shaft, or
to disconnect it therefrom, a considerable variety
of arrangements may be used. That shown in
Fig. 6 includes a sleeve 42 secured rigidly on the 36
end portion of the worker shaft 43, this sleeve be
ing provided with a hexagonal, octagonal, or
other ?at-sided shape in transverse section. The
power unit includes a hollow shaft 44 having an
internal bore 45 complemental in shape to the 40
cross-sectional form of the sleeve 42. In the ar
rangement illustrated both are of octagonal form
and the sleeve ?ts very loosely inside the bore of
the hollow shaft. This shaft has a gear 46 in
tegral with it and meshing with a pinion 41 se 45
cured fast on the crank shaft H] of the motor,
a cover plate 48 being provided to enclose this
gearing at the front side of the unit and being
rigidly secured to the frame piece 8 so that it
can also be utilized as the support for the front 50
ball bearing for the crank shaft I0.
In using this device it is connected with a suc
tion hose, as shown in Fig. 2, and the workman
simply slides the unit axially over the ‘end of a
worker shaft equipped with a sleeve 42, as indi 55
cated in said ?gure. Preferably the sleeve is
provided with an integral collar 5| which serves
subject the pistons successively to the negative
as a stop or abutment for arresting the move
pressure or suction of the vacuum line and sub—
ment of the unit when it has been slipped on to
the collar for a proper distance. The workman 60
swings the unit in a direction opposite to that
in which it is to drive the worker until it comes
to rest upon any adjacent part of the machine
and then throws the valve 23 to start the motor
up into the proper direction. He then leaves the 65
power unit running in this position and supported
60 sequently to cut off said suction and to admit air
to the tops of the pistons, as desired, in order to
produce a continuous rotative movement of the
crankshaft II], the cams being properly timed and
designed to give this result.
The direction of rotation of the motor is con
trolled by the reversing valve 23, which is best
shown in Figs. 4 and 5. This valve comprises a
metal tube ?tting snugly, but slidably, in the
bore of the
70 cut-out 40
ber 2|, Fig.
with which
75 the bore of
valve block 22, and provided with a
of su?icient length to afford com
between the pressure port or cham
5, and either one of the ports a or b
the respective tubes 24 and 25 are
At opposite sides of the cut-out 40
the valve 23 is completely closed. by '
solely by its engagement with the worker shaft
and its loose contact with an adjacent part of
the machine While he runs the suction hose over
the surface of the worker in the usual manner 70
to strip it. As soon as this operation has been
completed on one worker he shuts off the motor,
withdraws it from engagement with the worker
shaft and moves on to the next one, and so on,
repeating these operations at each successive 75
Each worker shaft is permanently
equipped with its own sleeve 42 so that the con
nection of the power unit to any worker simply
involves sliding it axially over the end portion
of the shaft. Thus the workman is enabled to
proceed rapidly with the stripping operation on
all of the workers of the entire set. He can per
form this operation more rapidly than otherwise
would be possible because of the fact. that the
10 worker can be driven at a faster speed than has
been possible manually and at a rate best adapt
ed to e?icient stripping. By using light weight
alloys wherever possible in the manufacture of
the unit, it can be made so light in weight that
15 the handling of it in the manner required is not
arduous. It should be observed that the hollow
shaft 44 is so offset with reference to the pistons
that either end of the shaft may be slipped over
the sleeve 42 and against the collar 5|. Thus the
20 operator may work from either side of the card
that is'most convenient. It will, of course, be
understood that prior tov starting the stripping
operation the machine has been shut down and
the usual driving chain or belt which operates
25 the workers has been disconnected from them.
The inertia of the workers is very substantial,
and in order to reduce the shock initially pro
duced in starting up one of these elements, it is
often desirable to introduce a shock absorbing
30 device somewhere in the connections between the
motor and the worker shaft. An arrangement
adapted for this purpose is illustrated in Fig. '7.
As there shown the hollow shaft 44 of the con
struction above described has been replaced with
35 a shaft 54 having a wall of reduced thickness and
provided with a bore of circular cross-sectional
form. A supplemental shaft 55 is relatively
mounted inside of the shaft 54 and this supple
mental shaft is provided with a bore of octagonal
4.0 cross-sectional shape to receive loosely the sleeve
42 in the same manner that it is received by the
shaft 54 of the construction above described. Be»
tween these two members 54 and 55 a heavy coiled
spring 56 is interposed, the two ends of this spring
45 being secured to the parts 54 and 55, respectively,
and the body of the spring encircling the latter
shaft. This spring should be of such dimensions
that in its normal or untensioned condition it
will occupy a space approximately midway be
50 tween the outer surface of the part 55 and the
inner wall of the member 54. Consequently, when
the motor is started up after the unit has been
placed on the end of a worker shaft, rotation in
one direction will ?rst have the effect of wind
55 ing up the spring 55 until it tightly grips the sur
face of the shaft 55, after which this member
will be compelled to rotate with the driving sleeve
54. In the meantime, however, the act of wind
ing up the spring has created a gradually increas
60 ing torque which preferably will initiate the ro
tation of the worker shaft before the spring is
completely tightened around the member 55. In
any event, it will cushion the shock that otherwise
would be produced by the inertia of the worker.
65 If the rotation of the driving shaft 54 is in the
opposite direction, then the same action will be
produced, but in this instance the spring 56 will
be unwound and expanded into contact with the
bore of the ‘shaft 54, the driving torque increas~
70 ing as the expansion of the spring progresses.
As above stated, it is convenient to operate the
motor by suction since the stripping operation
preferably is performed by the vacuum method.
If for any reason, however, it should be desired
to operate the motor by air under pressure, the
identical construction above described can be
used, a compressed air hose being connected to
the power unit instead of a suction hose. The
only difference would be that with a given ad
justment of the valve 23, the motor would run in
the opposite direction from that produced by
While I have herein shown and described a
preferred embodiment of my invention, it will be 10
understood that the invention may be embodied
in other forms without departing from the spirit
or scope thereof.
Having thus described my invention, what I de
sire to- claim as new is:
l. A wool card including workers, in combina
tion with a motor removably mounted on the end
of one of said workers and operative to revolve
said worker independently of the others, the con
nection between said motor and said shaft in 20
cluding coupling means axially slidable on the
shaft of any of said workers, whereby the motor
may be instantly connected with, or discon
nected from, any selected worker.
2. A wool card including workers, in combina 25
tion with a motor removably mounted on the end
of one of said workers and operative to revolve
said worker independently of the others, said
motor being supported by said Worker shaft and
by loose engagement with an adjacent part of‘ 30
the machine, whereby it may be quickly connect
ed with, or disconnected from, the worker shaft.
3. A wool card including workers, in combina
tion with a motor independent of said card but
removably mounted on the end of one of said 35
workers and operative to revolve the latter worker
independently of the others, and means for re
leasably and rotatively connecting said motor with
the shaft of any of said workers.
4. A wool card including workers, in combina 40
tion with a motor for driving said workers selec
tively and independently of each other and inde
pendently also of the mechanism with which the
machine is equipped for driving them, and means
for operatively connecting said motor with any 45
one of said workers, said connecting means being
readily releasable to permit the connection of
the motor to any selected worker.
5. A wool card including workers, in combina
tion with a motor for driving said workers selec
tively and independently of each other and inde
pendently also of the mechanism with which the
machine is equipped for driving them, and means
for operatively connectng said motor with a
worker including interengaging parts on said
motor and the shaft of each worker, whereby the
motor may be shifted from one worker to another
as desired.
6. A wool card including Workers and mech
anism for driving said workers to cause them to 60
perform their normal functions, in combination
with a motor releasably mounted on the end of
one of said workers and operative to drive it in
dependently of the others during the stripping
7. A wool card including workers and mech
anism for driving said workers to cause them to
perform their normal functions, in combination
with a pneumatic motor releasably mounted on
the end of one of said workers and operative to
revolve it independently of the others during the
stripping operation.
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